How about this link http://www.qsl.net/kb5ryo/dtmf.htm. Looks like you
can download the source too.
Bob Bruninga wrote:
> WHile I am impressed witht he barcode idea and am sure it has many applications, I wonder if there is a $20 keypad availble too.
>> With a digital keypad, then it would be easier to enter runner numbers and numbers for things one cannot reach-out and scan.
>> We have had an application for reporting scout roop patrols and scores and station numbers. I have wanted to use APRS-DTMF for that so that any HT can be used as a data entry device, but so far, no one has come up with the APS-dtmf program other than my DOS version that needs a $3 external DTMF chip... I'm hoping someone will do it on a sound card so here is no hardware needed.
>> See http://www.ew.usna.edu/~bruninga/aprstt.html>> de Wb4APR
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